package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    //切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFill() {
        log.info("auto fill");
    }

    @Before("autoFill()")
    public void before(JoinPoint joinPoint) {
        log.info("before");
        //获取当前方法的操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        //获取当前方法的注解
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = annotation.value();
        //获取当前方法的参数
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }

        Object arg = args[0];

        //准备填充的数据
        //获取当前时间
        LocalDateTime now = LocalDateTime.now();
        //获取当前用户
        Long currentUserId = BaseContext.getCurrentId();

        //通过反射填充数据
        if (operationType == OperationType.INSERT) {
            try {
                Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateTime.invoke(arg, now);
                setCreateUser.invoke(arg, currentUserId);
                setUpdateTime.invoke(arg, now);
                setUpdateUser.invoke(arg, currentUserId);


            } catch (Exception e) {
                log.error("insert auto fill error", e);
            }
        } else if (operationType == OperationType.UPDATE) {
            try {
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(arg, now);
                setUpdateUser.invoke(arg, currentUserId);
            } catch (Exception e) {
                log.error("update auto fill error", e);
            }
        }
    }



}
